The use of silver conductive paint for crack propagation sensor customization

Kurnyta, Artur; Kowalczyk, Kamil; Baran, Marta; Dziendzikowski, Michał; Dragan, Krzysztof

doi:10.1109/metroaerospace51421.2021.9511716

Cited by 5 publications

(3 citation statements)

References 14 publications

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“…The computed gauge factors λ are listed in each subfigure. Table 1 assembles the quantitative results over nine representative crack lengths, listing the load-derived strain from the MTS machine (MTS-strain), crack-induced strain, MTSderived to crack-induced strain ratio, linearity through the quality of the linear regression fit (R 2 ), gauge factors (λ) computed from MTS-derived strain and crack-induced strain, resolution through the 95% CI in terms of the relative change in capacitance and equivalent strain levels computed using equation (7) with MTS-induced λ, and standard derivation on the resolution (σ res ) measured from specimens 1 and 2. Results show that both the MTS-derived strain and crack-induced strain are increasing with the extension of the crack length, but with the crack-induced strain increasing at rate, resulting in a decrease of the strain ratio as the crack propagates.…”

Section: Electromechanical Sensingmentioning

confidence: 99%

“…Electromechanical methods are popular SHM techniques used to detect cracks through local changes in electrical properties. For example, using restive paints [7], carbon nanotube (CNT)based films [8,9], flexible sheets of resistors [10], and soft elastomeric capacitors [11]. The promise of these technologies lies in the coverage of large structural surfaces enabling both fatigue crack discovery and quantification during operations.…”

Section: Introductionmentioning

confidence: 99%

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Multifunctional soft stretchable strain sensor for complementary optical and electrical sensing of fatigue cracks

Liu

Kollosche²,

Laflamme³

et al. 2023

Smart Mater. Struct.

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Fatigue-induced cracking in steel components and other brittle materials of civil structures is one of the primary mechanisms of degrading structural integrity and can lead to sudden failures. However, these cracks are often difficult to detect during visual inspections, and off-the-shelf sensing technologies can generally only be used to monitor already identified cracks because of their spatial localization. A solution is to leverage advances in large area electronics to cover large surfaces with skin-type sensors. Here, the authors propose an elastic and stretchable multifunctional skin sensor that combines optical and capacitive sensing properties. The multifunctional sensor consists of a soft stretchable structural color film sandwiched between transparent carbon nanotube electrodes to form a parallel plate capacitor. The resulting device exhibits a reversible and repeatable color change from light blue to deep blue with an angle-independent property, as well as a measurable change in capacitance, under external mechanical strain. The optical property is passive and engineered to visually assist in localizing fatigue cracks, and the electromechanical property is added to send timely warnings to infrastructure operators. The performance of the device is characterized in a free-standing configuration and further extended to a fatigue crack monitoring application. A correlation coefficient-based image processing method is developed to quantify the strain measured by the optical color response. Results show that the sensor performs well in detecting and quantifying fatigue cracks using both the color and capacitive signals. In particular, the color signal can be measured with inexpensive cameras, and the electrical signal yields good linearity, resolution, and accuracy. Tests conducted on two steel specimens demonstrate a minimum detectable crack length of 0.84 mm.

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Section: Electromechanical Sensingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multifunctional soft stretchable strain sensor for complementary optical and electrical sensing of fatigue cracks

Liu

Kollosche²,

Laflamme³

et al. 2023

Smart Mater. Struct.

View full text Add to dashboard Cite

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“…Some inorganic ceramics (e.g., zirconium phosphate, zeolite) are also combined with silver (Wang et al, 2021) thus are able to trap metal ions and may then be added to other materials (e.g., paints, plastics, waxes, polyesters) to confer antimicrobial properties (Asafa et al, 2021;Kurnyta et al, 2021;Ma et al, 2016). Among these materials, silver nanoparticles are increasingly being used as a comprehensive antimicrobial agent in clothing, food storage containers, pharmaceuticals, cosmetics, electronics, and optical devices.…”

mentioning

confidence: 99%

Thermal stability of packaging papers treated of silver water

Yavorov¹,

Todorova²,

Brodnjak³

et al. 2022

Proceedings - The Eleventh International Symposium GRID 2022

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Paper aging depends on the type and chemical composition of the fiber raw materials, the chemical additives used, such as dyes, fillers, sizing additives, pH and others as storage conditions of the paper (relative humidity and temperature) and the degree of exposure of temperature, light and some microbiological factors. The durability of paper is its ability to retain certain physic-mechanical, optical and chemical properties unchanged over time. In this context and in line with the increased consumption of coated or treated printing and packaging papers, the aging resistance of treated or coated paper is of a great scientific, research and applied interest. This research work inherently involves preparation and properties evaluation of thermal stability of packaging papers treated of silver water. In order to examine this process for woodfree packaging paper, accelerated thermal aging for 72h at temperature of 105°C and dynamic thermogravimetric analysis (TGA) was carried out of a pulp sample and four paper samples (three of them treated with silver water – 1, 2 and 3 ml) together with the structural-dimensional and strength properties of the laboratory obtained paper samples. The degree of colour changes in the CIELab colour space have been studied, bearing in mind that the changes in colour characteristics define the stability over time and even more – the influence of the silver water treatment. As a result of the studies carried out it was found out that paper do not change significantly during 72h of accelerated thermal ageing, but it is not recommended to be used more than 2 ml of silver water, as silver ions probably catalyze the aging process and the paper darkens and turns yellow in a greater degree. The change of the weight of the paper samples as a function of temperature was monitored by TGA. When comparing the weight losses, it was found out that for the paper sample treated with 2 ml of silver water the temperature of complete burning of the sample increased by 2.28°C. In addition, the surface of the treated paper samples is more even compared to the untreated due to the callandering effect of the manufacturing process.

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The CCPS (Customized Crack Propagation Sensor) Concept as a Crack Gauge with Enhanced Functional Features for SHM

Kurnyta,

Leski

2024

2024 11th International Workshop on Metrology for AeroSpace (MetroAeroSpace)

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The use of silver conductive paint for crack propagation sensor customization

Cited by 5 publications

References 14 publications

Multifunctional soft stretchable strain sensor for complementary optical and electrical sensing of fatigue cracks

Multifunctional soft stretchable strain sensor for complementary optical and electrical sensing of fatigue cracks

Thermal stability of packaging papers treated of silver water

The CCPS (Customized Crack Propagation Sensor) Concept as a Crack Gauge with Enhanced Functional Features for SHM

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